I switch (with a key combination) between a French keyboard, when I need to write text in French with accents, and an English keyboard when I need to type vario

I switch (with a key combination) between a French keyboard, when I need to write text in French with accents, and an English keyboard when I need to type various types of brackets e.g. [] and {}. I actually know two different French keyboard layouts ... and can touch type fairly efficiently using any of the three. I don't consider myself a very efficient user of keyboard shortcuts.